METHOD FOR COVERING AN OBJECT WITH A FILM AND EQUIPMENT IMPLEMENTING SAID METHOD

摘要

The invention concerns a method for covering an object with a film obtained by melting a thin layer of powder, which consists in: (a) providing an electrostatic fluidised bed of powder in a vat, said powder being essentially charged with a triboelectric charging device, other than the vat walls, located in the vat and/or outside the vat; (b) soaking in the vat the object connected to a zero potential or sufficient for covering it with powder; (c) then placing the powder coated object in an oven at a sufficient temperature until the coating film is obtained by the melting of the powder. The triboelectric charging device is for example a honey comb weave vertically arranged at the bottom of the vat.